Uva Ursi [Urinary]. Known as kinnikinnick (by Native Americans), mountain cranberry or bearberry, this evergreen shrub grows close to the ground, especially in elevations above 6,000 feet. Bears like the red berries, as did Native Americans. It is also used in Europe, where it grows in northern latitudes. Most commercial uva ursi is grown in Spain. The leaves contain an antiseptic substance known as arbutin, which is a helpful nutritional supplement for the urinary system. Uva ursi contains vitamin A, iron and manganese. It is also so high in tannin content that it has been used to tan leather. Each capsule contains 440 mg uva ursi.